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Charley Rattan's picture
World Hydrogen Leader , Charley Rattan Associates

UK based offshore wind & hydrogen corporate advisor and trainer; Faculty member World Hydrogen Leaders. Delivering global hydrogen and offshore wind corporate investment advice, business...

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  • Oct 7, 2021

A Danish firm says its plans for 10 floating turbines off the Caithness coast would be the world's largest.

Matt Chester's picture
Matt Chester on Oct 7, 2021

Seems like a real race to the top in terms of who would have the largest-- what's the general relationship between size of the turbines and output? Is one that's 10% bigger generally producing ~10% more power? 

James Kirby's picture
James Kirby on Oct 8, 2021

The wind speeds increase with height. The amount of increase depends upon a number of factors, but It is often assumed that the wind speeds go up in proportion to (H₁/H₀)(1/7) Where H is the hub HEIGHT above ground. There is also a cut in velocity where the turbine generates no power because wind speeds too low to turn the blades. Above a certain wind speed the wind turbines are braked to prevent damage to the equipment. As you may turbine blades bigger the hub height increases above ground. Additionally, the swept area increases. To a first-order, the power generated is proportional to the swept area and the hub height. So, the short answer would be yes, but that would neglect other factors are changing as well.

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